# Largest Insider Buys (by Dollars)

> Stocks with the largest total open-market insider buying by dollar value in the window, from SEC Form 4 filings.
> Period: last 180 days. Teaser: top 25 of 100 ranked names.
> Republic Services, leads this board at $1.6B.

## Ranking (teaser)

| # | Ticker | Issuer | bought |
|---|--------|--------|------||
| 1 | RSG | Republic Services, | $1.6B |
| 2 | RIVN | Rivian Automotive, Inc. / DE | $1.0B |
| 3 | JEF | Jefferies Financial Group | $986.6M |
| 4 | PBLS | Parabilis Medicines, | $441.4M |
| 5 | PSUS | Pershing Square USA, | $311.8M |
| 6 | MAIR | Madison Air Solutions | $219.6M |
| 7 | BXDC | Blackstone Digital Infrastructure Trust | $191.2M |
| 8 | COE | 51Talk Online Education Group | $181.6M |
| 9 | BRVE | Braveheart Bio, | $159.0M |
| 10 | LILA | Liberty Latin America | $157.3M |
| 11 | LEN | Lennar | $136.4M |
| 12 | ALKT | Alkami Technology, | $135.2M |
| 13 | GPI | Group 1 Automotive | $121.0M |
| 14 | ARTV | Artiva Biotherapeutics, | $109.0M |
| 15 | SMMT | Summit Therapeutics | $103.6M |
| 16 | SCTH | Securetech Innovations, | $100.0M |
| 17 | LNBIX | Lincoln Bain Capital Total Credit Fund | $100.0M |
| 18 | PBLSX | AMG Pantheon Infrastructure Fund, LLC | $99.4M |
| 19 | CRBG | Corebridge Financial, | $96.3M |
| 20 | WGS | GeneDx Holdings | $93.1M |
| 21 | KARD | Kardigan, | $90.0M |
| 22 | DPC | DPC Holdings | $75.8M |
| 23 | ODTX | Odyssey Therapeutics, | $75.3M |
| 24 | BRCB | Black Rock Coffee Bar, | $73.4M |
| 25 | AXIA3 | AXIA Energia S.A. | $71.9M |

## How this is computed

Computed from open-market insider purchases (SEC Form 4, transaction code P) over the last 180 days, normalized within minutes of acceptance. Counts reflect the 13F filers and securities Arkolith tracks, not the entire institutional universe.

## Full data via the API and MCP

This page is a teaser. The complete book, full quarter-over-quarter history, and per-datapoint
provenance are available through the metered REST API and MCP server.

- Endpoint: https://arkolith.com/api/mcp (transport: streamable-http)
- Auth: Bearer API key. Mint one and copy a ready-to-paste command at https://arkolith.com/connect
- Claude Code: `claude mcp add --transport http arkolith https://arkolith.com/api/mcp --header "Authorization: Bearer YOUR_API_KEY"`
- Discovery: `tools/list` costs no credits but needs the API key (the server answers 401 without one); `tools/call` is metered by credits.

### Machine-readable
- Tool catalog JSON: https://arkolith.com/api/mcp/catalog
- MCP descriptor: https://arkolith.com/.well-known/mcp.json
- OpenAPI 3.1 REST spec: https://arkolith.com/openapi.json
- Full LLM guide: https://arkolith.com/llms-full.txt
- Human docs: https://arkolith.com/docs

## Source and method

- Source: SEC EDGAR Form 4 (public domain).
- Human page: https://arkolith.com/rank/largest-insider-buys
- Per-datapoint lineage: call the `provenance.get` MCP tool for the source URL and fetch history behind any figure.

Paid product. $1 trial at signup: 300 research credits over three days, then $29/mo, cancel any time. Most calls cost 1 credit (~$0.01); heavier point-in-time / cross-source tools cost more.

_Latest disclosed public filings. Data, not investment advice._